body {
    background: rgb(242, 242, 242);
    margin: 0px;
    padding: 0px;
    font: 12px;
    background: url(../Practice/image/bg.png) no-repeat;
}

.header {
    width: 1000px;
    height: 179px;
    margin: 0 auto;
    z-index: 10px;
}

.head1 {
    position: absolute;
    top: 30px;
}


/*清除浮动*/

.cls {
    clear: both;
}

h1 {
    margin: 0 0 10px 0;
    padding: 0;
}

ul,
li {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

.wechat {
    position: fixed;
    width: 200px;
    height: 200px;
    right: 5px;
    bottom: 20px;
}

.sidebar1 {
    /* margin: 0 auto; */
    float: left;
    width: 200px;
    margin-left: 250px;
    min-height: 428px;
    padding-left: 10px;
    /* border-right: 1px dashed red; */
    /* background-color: #ff77bb; */
}

.right-side {
    border: 1px black;
    border-radius: 20px;
    position: absolute;
    float: left;
    top: 239px;
    margin-left: 200px;
    width: 551px;
    height: 408px;
    padding-left: 10px;
    background-color: azure;
}


/* 水平菜单带垂直子菜单 */

.container {
    width: 1000px;
    margin: 0 auto;
    font: 20px bolder;
    margin-bottom: 20px;
    /* position: static; */
}

.menu {
    width: 1000px;
    height: 40px;
}

.menu li {
    float: left;
    width: 120px;
    height: 40px;
    line-height: 40px;
    text-align: center;
}

.menu a {
    display: block;
    color: #ac146f;
    height: 39px;
    width: 120px;
    /* border-right: 1px solid #ccc; */
    border-bottom: 1px solid #b3b3b3;
}

.menu .submenu {
    visibility: hidden;
    width: 120px;
}

.menu a:hover {
    background-color: rgb(206, 241, 183);
    border-bottom: 1px solid #ff0000;
}

.menu li:hover .submenu {
    visibility: visible;
    position: relative;
    z-index: 100;
}

.menu .submenu li {
    height: 35px;
    background-color: #e6e4e4;
    line-height: 35px;
}

.menu .submenu a {
    /* background-color: rgb(206, 241, 183); */
    color: #ac146f;
    border: 0;
}

.menu .submenu a:hover {
    background-color: rgb(206, 241, 183);
}

.menu1 {
    width: 200px;
    height: 160px;
    background-color: rgb(196, 224, 255);
}

.menu1 li {
    width: 200px;
    height: 39px;
    background-color: rgb(250, 122, 122);
    border-bottom: 1px solid brown;
    line-height: 39px;
}

.menu1 a {
    display: block;
    width: 170px;
    height: 39px;
    padding-left: 20px;
    color: white;
    border-left: 10px solid rgb(158, 12, 12);
}

.menu1 :hover {
    background-color: rgb(185, 98, 98);
    border-left: 10px solid rgb(245, 11, 11);
}


/* .sep {
    height: 60px;
} */

div .problem {
    width: 541px;
    height: 329px;
    margin: 0 auto;
}

.right-side p {
    margin-top: 10px;
    text-align: center;
}

.content {
    position: absolute;
    float: left;
    background-color: rgb(255, 255, 255);
    font-size: 12px;
    margin-left: 772px;
    top: 239px;
    width: 298px;
    height: 425px;
}

.content1 {
    position: absolute;
    float: left;
    background-color: rgb(255, 255, 255);
    font-size: 12px;
    margin-left: 220px;
    top: 678px;
}

.content tr {
    padding: 10px;
}


/*.footer {
    top: 900px;
    z-index: 100;
    filter: alpha(Opacity=80);
    line-height: 40px;
    margin-top: 10px;
    padding-left: 10px;
    padding-right: 10px;
    background: #b6d9f3;
    height: 40px;
    margin: 0 auto;
    position: absolute;
}*/

.footer {
    width: 100%;
    top: 900px;
    z-index: 100;
    line-height: 40px;
    margin-top: 10px;
    padding-left: 10px;
    padding-right: 10px;
    background: #b6d9f3;
    height: 40px;
    margin: 0 auto;
    position: absolute;
    text-align: center;
}